Xfinity TV remote app opens in web browser ONLY

I downloaded the above app and when I sign into it is says it needs to open in my web browser. It then opens in Xfinity Manage your account. I've never had an app do this - it is useless as an app. I wanted to be able to record shows on my DVR when I am away from my remote.

I downloaded it from Google play onto a Motorola Droid Turbo and also on my Lenovo tab but neither open the app

Can anyone help? I have been on chat with Comcast for the last hour and they have not been able to help me